CN206805094U - A kind of high-contrast electrophoresis type display device - Google Patents

Abstract

The utility model discloses a kind of high-contrast electrophoresis type display device, including the upper substrate being sequentially connected, the convex-concave layer positioned at upper substrate lower surface, the compound public electrode positioned at convex-concave layer lower surface, and electrophoresis layer, driver element and infrabasal plate.Convex-concave layer of the present utility model and compound public electrode improve white or scattering or the reflection efficiency of color electrophoresis particle, and inhaling the light of black particles is improved, and realizes that high-contrast is shown；Compound public electrode enhances the flexibility of electrode design using the organic material and the high inorganic material composite construction of reliability of bend resistance, reduces interlayer by being thinned and reflects, and realizes translucency, electric conductivity and the excellent combination property of bending property；Although the structure of film is more complicated, membrane process is patterned into without fine, the totle drilling cost of whole electrophoresis type display device is influenceed little.The utility model provides the guarantee of optical property for the application of Electronic Paper replacement paper printing matter, and it is possible that Electronic Paper obtains widely application offer.

Description

A kind of high-contrast electrophoresis type display device

Technical field

It the utility model is related to electronic paper technology field, more particularly to a kind of high-contrast electrophoresis type display device.

Background technology

Electrophoretic display apparatus is the display of a species paper mold, generally includes prebasal plate, public electrode, electrophoresis layer, driving Unit and metacoxal plate.According to the difference of the microminiaturization partitioning scheme of electrophoresis liquid, electrophoretic display apparatus can be divided into microcapsule-type and micro- Two big type of cup type.In the electrophoretic display apparatus of microcapsule-type, electrophoresis liquid is sealed in large number of, micron dimension capsule In.In micro-cup type electrophoretic display apparatus, electrophoretic dispersions solution is divided the picture cup one of many micron dimensions by spaced walls The junior unit of sample.These small capsules or micro-cup structure, aggegation is produced when being the long-time transfixion for preventing electrophoresis particle. When applying electric signal to electrophoresis layer, electrophoresis particle according to the polarity of signal, move in contrast by direction, so as to display image.Electricity Display device of swimming can be in the case where not applying electric signal, and electrophoresis particle rests on the surface of electrode, that is, remains to protect for a long time Hold shown image.Specifically, though not to electrophoretic display apparatus apply electric field, shown image can also keep a few days or Several months.Only when changing image, just need to apply electric field to electrophoresis layer.In the application that need not frequently refresh, it can make Circuit saves a large amount of power consumptions in a dormant state.

The essence of Electronic Paper display image is by nanoparticle reflective or scatter ambient light, different types of nano-particle With different reflectivity, the image for showing black, white or other colors is realized.The imaging principle and paper of electrophoresis type display device Similar, the visual experience of image is referred to as class paper display close to the display effect of paper.Nevertheless, existing electrophoresis Display device also has very big improvement leeway in image quality.For example, the electrophoresis type display device as paperlike display device has More than 40% white light reflectance, compared with other types of reflective display, there is obvious advantage.But electrophoretype Highest reflectivity after the various materials of display device and structure optimization is 50% or so, and this is anti-with the 70-80% of printed matter The rate of penetrating also have quite poor away from.Therefore, the reflectivity of electrophoresis type display device is improved, is always important problem.

Utility model content

According to the reflectivity technical problem proposed in background technology, and provide a kind of high-contrast electrophoresis type display device. Structure and compound public electrode structure of the utility model using the electrophoresis particle surface area of increase observation side, are reduced in electrophoresis liquid Solvent, observation lateral electrode and the method for substrate interlayer reflection, while improve the reflectivity of electrophoresis particle.Do not changing electrophoresis grain Under conditions of itself sub reflection characteristic, the reflectivity of electrophoretic display apparatus can be also improved.This kind of electrophoresis type display device with it is existing Technology is compared, and has similar or identical cost, manufacture difficulty, the high advantage of contrast.The contrast close to paper can be realized Degree, has widened the application of Electronic Paper, can preferably meet requirement of the human eye to Electronic Paper legibility.

The technological means that the utility model uses is as follows：

A kind of high-contrast electrophoresis type display device, including the upper substrate being sequentially connected, positioned at the upper substrate lower surface Convex-concave layer, the compound public electrode positioned at the convex-concave layer lower surface, and electrophoresis layer, driver element and infrabasal plate.

The convex-concave layer and the upper substrate are integrally formed or deposited to the upper substrate lower surface, no matter which kind of mode shape Into the convex-concave layer be respectively provided with good light and pass through characteristic and surface smoothness.

The convex-concave layer for depositing to the upper substrate lower surface be by imprinting moulding, engraving process, printing, ink-jet or The shaping of the technical methods such as photoetching, and the material of the obtained convex-concave layer and the upper substrate are identical or different.

The convex-concave layer is alternately arranged by the raised and multiple semi-cylindrical depression of multiple semi-cylindricals and formed, or by other not Can produce similar to prism effect light-transfer characteristic geometry composition, no matter which kind of mode, by the convex-concave layer shape The electrophoresis particle of arrangement can increase reflection, the surface area of scattering in various degree.Forming each shape of the convex-concave layer can not produce The raw light-transfer characteristic similar to prism effect, its effect increase primary event rate reduce a transmitance of light.

The raised height of the convex-concave layer is less than or equal to 10 μm, and the depth of the depression of the convex-concave layer is less than or equal to 10 μ m.Excessive projection and depression can influence response speed and homogeneity of the electrophoresis particle under electric field action, while narrow visual angle.

The refractive index of the convex-concave layer material is less than the refractive index of the upper substrate material, from optically denser medium to optically thinner medium The transmitance of light can be improved.

The compound public electrode includes the refractive index of material successively according to the plural layers of small, big staggeredly superposition, is located at The refractive index of the thin-film material of the compound public electrode both sides is less than adjacent thereto be located inside the compound public electrode Thin-film material refractive index.For example, the compound public electrode includes the first film successively, and the second film, the 3rd film, Four films and the 5th film, the refractive index of the first film material are less than the second film, and the refractive index of the 3rd thin-film material is less than the Four films, the first film and the 5th film are located at the compound public electrode both sides, and be located at adjacent with the first film is described multiple The film closed inside public electrode is the second film, the film positioned at the compound public electrode inside adjacent with the 5th film For the 4th film.

Electrophoresis type display device is to realize that image is shown by reflection environment light, and light passes through upper substrate, convex-concave layer, compound Public electrode and partial solvent or solvent mixture, the upside of upper substrate is reflected or is scattered back by electrophoresis particle.According to material Difference, film is thicker, Refractive Index of Material difference is bigger, and it is also bigger to produce interlayer reflectivity.Interlayer reflection loss have 5% or with On.Therefore each layer reflected light increase transmitance is effectively reduced, the reflectivity of white or color electrophoresis particle, light can be effectively improved Line transmitance increase is advantageous to effective absorption of black electrophoretic particles, reduces the reflectivity of black image, realizes electrophoretype electronics The high-contrast of paper device is shown.According to the transmission characteristic of light, reduce the thickness of each layer, make the film material of compound public electrode Expect that refractive index alternately changes, passing through for upper substrate, convex-concave layer, compound public electrode and part electrophoresis liquid light can be effectively increased Rate.Meet the requirement of electric conductivity by plural layers, while the refractive index difference of each layer film reduces.At the same time, to design Go out the conductive film and white or color electrophoresis particle contact of antiradar reflectivity, increase the reflectivity of electrophoresis particle.Antiradar reflectivity Conductive film and black electrophoretic particles contact, because most of light is absorbed, harmful effect can be ignored.This and prior art Ito thin film is compared, and can effectively improve the reflectivity of white electrophoretic particles.Due to the film of compound public electrode can use it is more Kind material, reduces film thickness, can still have good electric conductivity, while do not form visual reflection effect again.

The refractive index of thin-film material on the outside of the compound public electrode adjacent with the convex-concave layer is less than the convex-concave The refractive index of layer material.

The refractive index of thin-film material on the outside of the compound public electrode adjacent with the electrophoresis layer is less than the electrophoresis The refractive index of the material of each constituent of layer.

The plural layers include at least one layer of conductive film, i.e., can have non-conductive film in described plural layers.

The plural layers are transparent membrane.

There is good transmission characteristic in 400nm-700nm visible lights area to realize, plural layers can be used Mode reduces reflectivity, increases the transmission characteristic of light.In order to good electric conductivity, set conductive film as far as possible close to institute Electrophoresis layer side is stated, and multilayer conductive film can be used.The material of conductive film, can be that organic material can also be inorganic Material, relatively, interlaminar adhesion is good, and bend resistance, inorganic material has Low ESR, not bending resistance for the refractive index of organic material Folding, the ability for being resistant to various solvents are stronger.

The plural layers include multilayer organic material film and multilayer inorganic material film.

The liquid level or electrochromic layer of the electrophoresis layer electrowetting substitute；

Film on the outside of the compound public electrode adjacent with the liquid level of the electrowetting or the electrochromic layer The refractive index of material is less than the refraction of the liquid level of the electrowetting or the material of each constituent of the electrochromic layer Rate.

The electrophoresis layer includes micro-cup spaced walls or capsule, and the electricity being closed in the micro-cup spaced walls or the capsule Swimming liquid, the electrophoresis liquid include solvent or solvent mixture, and the electrophoresis being scattered in the solvent or the solvent mixture Particle.

If the refractive index of certain layer membrane materials is higher, the thin-film material of the close electrophoresis layer side adjacent thereto Refractive index is less than the refractive index of the layer film material, i.e., if the refractive index of thin-film material is higher, such as ITO, to apply behind The film of more low-refraction is covered to improve the reflectivity of white electrophoretic particles.

Film on the outside of the compound public electrode adjacent with the electrophoresis layer is conductive film.

The conductive material of film selection low-refraction on the outside of the compound public electrode adjacent with the electrophoresis layer, energy The reflectivity of white particles is effectively improved, while does not influence drive characteristic.

A kind of high-contrast electrophoresis type display device provided by the utility model has the beneficial effect that：

High-contrast electrophoresis type display device provided by the utility model, compared with prior art, is increased using convex-concave layer Surface area and using compound public electrode adjust refractive index come improve white or color electrophoresis particle scattering or reflection efficiency, And can be improved the light suction of black particles, realize that high-contrast is shown.Compound public electrode, because using the organic of bend resistance Material and the high inorganic material composite construction of reliability, enhance the flexibility of electrode design, reduce interlayer by being thinned and reflect, Realize translucency, electric conductivity and the excellent combination property of bending property.Although the structure of film is more complicated, without fine figure Membrane process is melted into, the totle drilling cost of whole electrophoresis type display device is influenceed little.High-contrast electrophoresis type display device, it is electronics The application of paper replacement paper printing matter provides the guarantee of optical property, and it is possible that Electronic Paper obtains widely application offer.

The utility model can be widely popularized in technical fields such as Electronic Papers for the foregoing reasons.

Brief description of the drawings

, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art Or the required accompanying drawing used is done simply to introduce in description of the prior art, it should be apparent that, drawings in the following description are Some embodiments of the utility model, for those of ordinary skill in the art, do not paying the premise of creative labor Under, other accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is a kind of structure diagram of high-contrast electrophoresis type display device in specific embodiment of the present utility model.

Fig. 2 is a kind of convex-concave layer of high-contrast electrophoresis type display device in specific embodiment of the present utility model, answered Close public electrode and electrophoresis layer position relationship schematic diagram.

Fig. 3 is a kind of compound common electrical of high-contrast electrophoresis type display device in specific embodiment of the present utility model The partial schematic diagram of pole.

In figure, 1：Upper substrate；2：Convex-concave layer；3：Compound public electrode；4：Electrophoresis layer；5：Driver element；6：Infrabasal plate；7： Semi-cylindrical is raised；8：Solvent；9：Electrophoresis particle；10：First PEDOT：PSS films；11：Ito film；12：2nd PEDOT：PSS Film.

Embodiment

It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer Accompanying drawing in type embodiment, the technical scheme in the embodiment of the utility model is clearly and completely described.Obviously, retouched The embodiment stated is a part of material type of the utility model and the embodiment of device architecture, rather than whole embodiments, also There are numerous preferred embodiments not list.Based on the embodiment in the utility model, those of ordinary skill in the art are not doing Go out under the premise of creative work all other embodiment obtained, belong to the scope of the utility model protection.

The structure of a kind of high-contrast electrophoresis type display device of the present utility model, as shown in figure 1, upper substrate 1 is 50 μm Thick PET film；Convex-concave layer 2 is that a diameter of 5 μm of semi-cylindricals depression and semi-cylindrical projection 7 are attached to made of acrylic resin The lower surface of upper substrate 1；Electrophoresis layer 4 is to include electrophoresis liquid and micro-cup spaced walls, and the electrophoresis particle 9 in electrophoresis liquid is electronegative The white titania particle of black carbon black particle and positively charged；Driver element 5 is by pixel electrode, non-silicon TFT, storage electricity Hold, Source lines and Gate lines composition, driver element 5 are attached to the upper surface of infrabasal plate 6；Infrabasal plate 6 is flexible PI films, has one Fixed bending characteristic.

Provided in Fig. 2 under dispaly state, the position between electrophoresis particle 9, solvent 8, compound public electrode 3 and convex-concave layer 2 Relation.It can be seen that the surface area in right-angle view direction is significantly enlarged.

Upper substrate 1, convex-concave layer 2 and the refractive index of compound public electrode 3 and electrophoresis layer 4 in lower surface analysis embodiment close System, as shown in Figure 3.Each layer film of compound public electrode 3 is the first PEDOT successively：PSS films 10, ito film 11, second PEDOT：PSS films 12.Because PET (material of upper substrate 1) refractive index is 1.65, acrylic resin (material of convex-concave layer 2) Refractive index is 1.42, PEDOT：PSS (the first PEDOT：The PEDOT of PSS films 10 and the 2nd：The material of PSS films 12) refractive index is 1.56th, the refractive index of ito film 11 is that the 1.8, refractive index of white titania particle is 2.76.Solvent selects ethanol class, refraction Rate 1.4 or so.Refractive index is changed repeatedly between size between each layer, and PEDOT：PSS refractive index is rolled over significantly less than ITO Penetrate rate.Compound public electrode film is more beneficial for improving the light output efficiency of white titania particle, lowered than ITO electrode The reflectivity of black carbon black particle.

Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model, rather than its limitations； Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that： It can still modify to the technical scheme described in previous embodiment, either to which part or all technical characteristic Carry out equivalent substitution；For example electrode material is converted, increase the electrode film number of plies, change convex-concave layer shape, and change electrophoresis grain Species, the spaced walls shape of son, type of substrate, the composition of driver element, and the mode that the utility model is easily realized.For The Electronic Paper pattern of other similar structures, such as electrochromism and electrowetting, vacuum powder fluid isotype are applied equally to The utility model.It is all it is of the present utility model change and change within, all any modification, equivalent and improvement done etc., It should be included within the scope of protection of the utility model.

Claims (10)

1. a kind of high-contrast electrophoresis type display device, it is characterised in that including the upper substrate being sequentially connected, positioned at the upper base The convex-concave layer of plate lower surface, the compound public electrode positioned at the convex-concave layer lower surface, and electrophoresis layer, driver element and lower base Plate.

A kind of 2. high-contrast electrophoresis type display device according to claim 1, it is characterised in that：The convex-concave layer and institute State upper substrate and be integrally formed or deposit to the upper substrate lower surface.

A kind of 3. high-contrast electrophoresis type display device according to claim 1, it is characterised in that：The convex-concave layer is by more The raised and multiple semi-cylindrical depression of individual semi-cylindrical is alternately arranged composition, or can not be produced similar to prism effect by other The geometry composition of light-transfer characteristic.

A kind of 4. high-contrast electrophoresis type display device according to claim 1, it is characterised in that：The convex-concave layer it is convex The height risen is less than or equal to 10 μm, and the depth of the depression of the convex-concave layer is less than or equal to 10 μm.

A kind of 5. high-contrast electrophoresis type display device according to claim 1, it is characterised in that：The compound common electrical Pole includes the refractive index of material successively according to the plural layers of small, big staggeredly superposition, positioned at the compound public electrode both sides The refractive index of thin-film material is less than the refractive index of the thin-film material inside the compound public electrode adjacent thereto.

A kind of 6. high-contrast electrophoresis type display device according to claim 5, it is characterised in that：With the electrophoresis layer phase The refractive index of thin-film material on the outside of the adjacent compound public electrode is less than the material of each constituent of the electrophoresis layer Refractive index.

A kind of 7. high-contrast electrophoresis type display device according to claim 5, it is characterised in that：The plural layers bag Include at least one layer of conductive film.

A kind of 8. high-contrast electrophoresis type display device according to claim 5, it is characterised in that：The electrophoresis layer electricity consumption The liquid level or electrochromic layer of wetting substitute；

Thin-film material on the outside of the compound public electrode adjacent with the liquid level of the electrowetting or the electrochromic layer Refractive index be less than the electrowetting liquid level or the electrochromic layer each constituent material refractive index.

A kind of 9. high-contrast electrophoresis type display device according to claim 5, it is characterised in that：If certain layer membrane materials Refractive index it is higher, the refractive index of the thin-film material of the close electrophoresis layer side adjacent thereto is less than the layer film material Refractive index.

A kind of 10. high-contrast electrophoresis type display device according to claim 5, it is characterised in that：With the electrophoresis layer Film on the outside of the adjacent compound public electrode is conductive film.